A faun is a rural god taking the form of a man with goat ears, horns, tail, and legs. The word comes form Latin, and the word and the deity are thought to descend from the Greek Pan, also a goatlike half-human god. In early English use, the word was sometimes spelled fawn, but the modern spelling has been settled for many centuries.
Fawn is the term for the young of several animal species, including deer. The word also works as a verb meaning to flatter or show obsequious attention (usually with over). Fawn, its two main senses having separate French and Latin origins, is etymologically unrelated to faun.